Zainal Arifin, Tjetjep Yusuf Afandi, Elis Irmayanti. Improving the Quality of Learning Through the Application of Group Investigation Model for Economic Education Study Program Students. IJHESS [Internet]. 2022 Jun. 27 [cited 2026 Apr. 30];1(6). Available from: https://ijhess.com/index.php/ijhess/article/view/196